1,4-Benzenedicarboxamide, N,N'-bis[4-[[(ethylamino)iminomethyl]amino]phenyl]-, dihydrochloride 21689-60-1 NSC71202 Terephthalanilide, 4',4''-bis(2-ethylguanidino)-, dihydrochloride Terephthalanilide, 4',4''-bis(3-ethylguanidino)-, dihydrochloride